RHSA-2021:1272 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Use after free via PI futex state (CVE-2021-3347)
• kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)
• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
• kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• System Crash / Core dump while deleting VMs (BZ#1897687)
• various patches to stabilize the OPAL error log processing and the powernv dump processing (ESS) (BZ#1907302)
• Unable to receive the signal registered using mq_notify(). (BZ#1926111)
• SCTP "Address already in use" when no active endpoints from RHEL 8.2 onwards (BZ#1927522)
• enable CONFIG_RANDOM_TRUST_CPU (BZ#1928027)
• [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929739)
• Configuring the system with non-RT kernel will hang the system (BZ#1930737)
• fNIC driver needs a patch fix that addresses crash (BZ#1932460)
• OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944670)

Enhancement(s):

• mlx5: Hairpin Support in Switch Mode (BZ#1924690)
• Trace mode enablement in IMC to facilitate perf-kvm support (perf:) (BZ#1929696)
• ice: Enable Flow Director Support (BZ#1930780)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2 x86_64
• Red Hat Enterprise Linux Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 aarch64

Fixes

• BZ - 1922249 - CVE-2021-3347 kernel: Use after free via PI futex state
• BZ - 1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem
• BZ - 1930079 - CVE-2021-27363 kernel: iscsi: unrestricted access to sessions and handles
• BZ - 1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module

CVEs

• CVE-2021-3347
• CVE-2021-27363
• CVE-2021-27364
• CVE-2021-27365

References

• https://access.redhat.com/security/updates/classification/#important